LED lamp, integrated circuit and power supply module thereof

An integrated circuit adapted for controlling a power supply module of an LED lamp, wherein the power supply module comprises a rectifying circuit, a filter circuit, and a conversion circuit electrically connected to each other through a power loop, and the integrated circuit comprises:

• a first pin, a second pin, and a third pin;
• a first circuit, electrically connected to the first pin and configured to generate a first signal for temporarily causing a current path to be conducted according to a signal received from the first pin to detect an installation state;
• a second circuit, electrically connected to the second pin to receive a second signal and configured to generate a third signal indicating the installation state based on the second signal;
• and
• a switch circuit, electrically connected to the conversion circuit and configured to output a control signal through the third pin such that the conversion circuit generates a steady current for the LED lamp if the installation state is a correct installation.

A power supply module adapted for driving an LED module, comprising:

• a rectifying circuit, having inputs for receiving an external power;
• a pi filter circuit, electrically connected to outputs of the rectifying circuit;
• a conversion circuit, electrically connected to the pi filter circuit and configured to convert a signal received from the pi filter circuit into a driving signal for causing the LED module to emit light;
• a control circuit, configured to temporarily cause a detection path to be conducted according to a signal received from the rectifying circuit, detect an input state of the power supply module, and output a control signal after the input state refers to a correct installation such that the conversion circuit generates the driving signal with a steady current which makes the LED module emit steady light;
• a mode switching circuit, electrically connected to the conversion circuit, configured to determine whether to perform a first driving mode or a second driving mode based on a detected signal;
• and
• a mode determining circuit, electrically connected to the mode switching circuit and the rectifying circuits, and configured to detect a frequency of the external power and generate the detected signal.